choke off vs congest

choke off and congest both are verbs.

Word	Noun	Adjective	Verb	Adverb
choke off	No	No	Yes	No
congest	No	No	Yes	No

As verbs, choke off and congest are synonyms defined as:

Other synonyms of choke off include back up, choke, clog, clog up, crap up, foul.

choke off (verb)	congest (verb)
suppress	become or cause to become obstructed
become or cause to become obstructed